To use the script, extract and save the .rvb file from the attached zip archive, then drag and drop the saved rvb over an open Rhino V4 or v5 window. This will load the script, set it up to load on startup in the future and register an alias

SectionRadial

SectionPath

that will run the script much like a regular command. The alias can be typed or added to a toolbar button or keyboard shortcut (F-key).